U.S. patent application number 17/435158 was filed with the patent office on 2022-06-30 for flexible printed circuit and display device.
The applicant listed for this patent is BOE Technology Group Co. Ltd., Chengdu BOE Optoelectronics Technology Co., Ltd.. Invention is credited to Qing Gong, Hengzhen Liang, Lianbin Liu, Xu Lu, Ting Qin, Hui Wen, Xiaolong Zhu.
Application Number | 20220210917 17/435158 |
Document ID | / |
Family ID | |
Filed Date | 2022-06-30 |
United States Patent
Application |
20220210917 |
Kind Code |
A1 |
Liu; Lianbin ; et
al. |
June 30, 2022 |
FLEXIBLE PRINTED CIRCUIT AND DISPLAY DEVICE
Abstract
A flexible printed circuit and a display device are provided.
The flexible printed circuit includes: a plurality of sub-circuit
boards arranged in a stack, wherein the plurality of sub-circuit
boards include at least a first sub-circuit board and a second
sub-circuit board; and a pressure sensor arranged on the first
sub-circuit board, wherein the first sub-circuit board includes: a
substrate film; a conductive film arranged on a side of the
substrate film away from the second sub-circuit board; an adhesive
layer arranged on a side of the conductive film away from the
substrate film; a cover layer arranged on a side of the adhesive
layer away from the substrate film; and an electromagnetic
shielding layer arranged on a side of the cover layer away from the
substrate film, wherein at least a part of the conductive film is
formed as an electrode of the pressure sensor.
Inventors: |
Liu; Lianbin; (Beijing,
CN) ; Liang; Hengzhen; (Beijing, CN) ; Lu;
Xu; (Beijing, CN) ; Zhu; Xiaolong; (Beijing,
CN) ; Gong; Qing; (Beijing, CN) ; Wen;
Hui; (Beijing, CN) ; Qin; Ting; (Beijing,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Chengdu BOE Optoelectronics Technology Co., Ltd.
BOE Technology Group Co. Ltd. |
Chengdu
Beijing |
|
CN
CN |
|
|
Appl. No.: |
17/435158 |
Filed: |
December 25, 2020 |
PCT Filed: |
December 25, 2020 |
PCT NO: |
PCT/CN2020/139511 |
371 Date: |
August 31, 2021 |
International
Class: |
H05K 1/14 20060101
H05K001/14; H05K 1/02 20060101 H05K001/02; H05K 1/03 20060101
H05K001/03; G01L 9/08 20060101 G01L009/08; G01L 9/12 20060101
G01L009/12; G01L 9/02 20060101 G01L009/02 |
Claims
1. A flexible printed circuit, comprising: a plurality of
sub-circuit boards arranged in a stack, wherein the plurality of
sub-circuit boards comprise at least a first sub-circuit board and
a second sub-circuit board; and a pressure sensor arranged on the
first sub-circuit board, wherein the first sub-circuit board
comprises: a substrate film; a conductive film arranged on a side
of the substrate film away from the second sub-circuit board; an
adhesive layer arranged on a side of the conductive film away from
the substrate film; a cover layer arranged on a side of the
adhesive layer away from the substrate film; and an electromagnetic
shielding layer arranged on a side of the cover layer away from the
substrate film, wherein at least a part of the conductive film is
formed as an electrode of the pressure sensor.
2. The flexible printed circuit of claim 1, wherein the flexible
printed circuit comprises a main body region and a protruding
region, the main body region has a thickness in a first direction
greater than a thickness of the protruding region in the first
direction, and the first direction is perpendicular to a surface of
the substrate film away from the second sub-circuit board; and
wherein the pressure sensor is arranged in the protruding
region.
3. The flexible printed circuit of claim 2, wherein the first
sub-circuit board comprises a portion arranged in the main body
region and another portion protruding with respect to the main body
region, and wherein the another portion of the first sub-circuit
board protruding with respect to the main body region forms the
protruding region.
4. The flexible printed circuit of claim 1, wherein a separation
distance between the conductive film and the electromagnetic
shielding layer in a first direction is within a range of 34.5
microns to 40.5 microns.
5. The flexible printed circuit of claim 4, wherein the adhesive
layer has a thickness of about 25 microns in the first
direction.
6. The flexible printed circuit of claim 2, wherein an orthographic
projection of the pressure sensor on the substrate film is spaced
from an orthographic projection of the main body region on the
substrate film.
7. The flexible printed circuit of claim 6, wherein the protruding
region comprises a transition region located between the pressure
sensor and the main body region, and wherein the flexible printed
circuit comprises a plurality of lines arranged in the transition
region.
8. The flexible printed circuit of claim 2, wherein an orthographic
projection of the main body region on the substrate film is
adjacent to an orthographic projection of the protruding region on
the substrate film.
9. The flexible printed circuit of claim 8, wherein an area of the
orthographic projection of the main body region on the substrate
film is greater than an area of the orthographic projection of the
protruding region on the substrate film.
10. The flexible printed circuit of claim 9, wherein the protruding
region protrudes from a side surface of the main body region, an
orthographic projection of the side surface on the substrate film
is formed as a dividing line, a ratio of a size of the orthographic
projection of the protruding region on the substrate film in a
direction perpendicular to the dividing line to a size of the
orthographic projection of the main body region on the substrate
film in the direction perpendicular to the dividing line is within
a range of 0.5 to 1.5.
11. The flexible printed circuit of claim 10, wherein a ratio of a
size of the orthographic projection of the protruding region on the
substrate film in a direction parallel to the dividing line to a
size of the orthographic projection of the main body region on the
substrate film in the direction parallel to the dividing line is
within a range of 0.15 to 1.
12. The flexible printed circuit of claim 10, wherein the size of
the orthographic projection of the protruding region on the
substrate film in the direction perpendicular to the dividing line
is about 13.4 mm; and/or the size of the orthographic projection of
the main body region on the substrate film in the direction
perpendicular to the dividing line is about 13.5 mm.
13. The flexible printed circuit of claim 1, wherein the main body
region comprises a first sub-circuit board and a second sub-circuit
board; or the main body region comprises a first sub-circuit board,
a second sub-circuit board and a third sub-circuit board; or the
main body region comprises a first sub-circuit board, a second
sub-circuit board, a third sub-circuit board and a fourth
sub-circuit board.
14. The flexible printed circuit of claim 13, wherein the main body
region comprises the first sub-circuit board, the second
sub-circuit board, the third sub-circuit board, the fourth
sub-circuit board and a bonding film, and wherein the fourth
sub-circuit board comprises a substrate film, a conductive film
arranged on a side of the substrate film, and an adhesive layer for
pasting the substrate film and the conductive film, and wherein
each of the second sub-circuit board and the third sub-circuit
board comprises a substrate film, conductive films arranged on
opposite sides of the substrate film, and adhesive layers for
pasting the substrate film and the conductive films, and wherein
the bonding film is provided between the first sub-circuit board
and the second sub-circuit board, between the second sub-circuit
board and the third sub-circuit board, and between the third
sub-circuit board and the fourth sub-circuit board.
15. The flexible printed circuit of claim 2, wherein the pressure
sensor comprises a first electrode and a second electrode located
in a same conductive film, and wherein a material of the first
electrode and a material of the second electrode comprise
copper.
16. (canceled)
17. The flexible printed circuit of claim 1, wherein a material of
the substrate film and a material of the cover layer comprise
polyimide.
18. A display device comprising the flexible printed circuit of
claim 1.
19. A display device, comprising: the flexible printed circuit of
claim 2; a display panel; and a battery, wherein an orthographic
projection of the battery on the display panel is spaced from an
orthographic projection of the main body region on the display
panel, and the orthographic projection of the battery on the
display panel at least partially overlaps an orthographic
projection of the protruding region on the display panel.
20. The display device of claim 19, wherein the orthographic
projection of the battery on the display panel at least partially
overlaps an orthographic projection of the pressure sensor on the
display panel.
21. The display device of claim 19, further comprising a spacer
member arranged on a side of the display panel facing the pressure
sensor, wherein the electromagnetic shielding layer is in contact
with the spacer member.
Description
CROSS REFERENCE TO RELATED APPLICATION(S)
[0001] This application is a Section 371 National Stage Application
of International Application No. PCT/CN2020/139511, filed on Dec.
25, 2020, entitled "FLEXIBLE PRINTED CIRCUIT AND DISPLAY DEVICE",
the contents of which are incorporated herein by reference in their
entireties.
TECHNICAL FIELD
[0002] The present disclosure relates to a field of a display
technology, and in particular to a flexible printed circuit and a
display device.
BACKGROUND
[0003] Flexible Printed Circuit (FPC) is a highly reliable and
flexible printed circuit board made of a flexible film as a
substrate. The flexible printed circuit has characteristics of high
wiring density, light weight, small thickness, and good
bendability, and may be widely used in various display devices such
as mobile phones, computers, and displays.
SUMMARY
[0004] According to an aspect of the present disclosure, a flexible
printed circuit is provided, and the flexible printed circuit
includes: a plurality of sub-circuit boards arranged in a stack,
wherein the plurality of sub-circuit boards include at least a
first sub-circuit board and a second sub-circuit board; and a
pressure sensor arranged on the first sub-circuit board, wherein
the first sub-circuit board includes: a substrate film; a
conductive film arranged on a side of the substrate film away from
the second sub-circuit board; an adhesive layer arranged on a side
of the conductive film away from the substrate film; a cover layer
arranged on a side of the adhesive layer away from the substrate
film; and an electromagnetic shielding layer arranged on a side of
the cover layer away from the substrate film, wherein at least a
part of the conductive film is formed as an electrode of the
pressure sensor.
[0005] According to some exemplary embodiments, the flexible
printed circuit includes a main body region and a protruding
region, the main body region has a thickness in a first direction
greater than a thickness of the protruding region in the first
direction, and the first direction is perpendicular to a surface of
the substrate film away from the second sub-circuit board; and the
pressure sensor is arranged in the protruding region.
[0006] According to some exemplary embodiments, the first
sub-circuit board includes a portion arranged in the main body
region and another portion protruding with respect to the main body
region; and the another portion of the first sub-circuit board
protruding with respect to the main body region forms the
protruding region.
[0007] According to some exemplary embodiments, a separation
distance between the conductive film and the electromagnetic
shielding layer in a first direction is within a range of 34.5
microns to 40.5 microns.
[0008] According to some exemplary embodiments, the adhesive layer
has a thickness of about 25 microns in the first direction.
[0009] According to some exemplary embodiments, an orthographic
projection of the pressure sensor on the substrate film is spaced
from an orthographic projection of the main body region on the
substrate film.
[0010] According to some exemplary embodiments, the protruding
region includes a transition region located between the pressure
sensor and the main body region; and the flexible printed circuit
includes a plurality of lines arranged in the transition
region.
[0011] According to some exemplary embodiments, an orthographic
projection of the main body region on the substrate film is
adjacent to an orthographic projection of the protruding region on
the substrate film.
[0012] According to some exemplary embodiments, an area of the
orthographic projection of the main body region on the substrate
film is greater than an area of the orthographic projection of the
protruding region on the substrate film.
[0013] According to some exemplary embodiments, the protruding
region protrudes from a side surface of the main body region, an
orthographic projection of the side surface on the substrate film
is formed as a dividing line, a ratio of a size of the orthographic
projection of the protruding region on the substrate film in a
direction perpendicular to the dividing line to a size of the
orthographic projection of the main body region on the substrate
film in the direction perpendicular to the dividing line is within
a range of 0.5 to 1.5.
[0014] According to some exemplary embodiments, a ratio of a size
of the orthographic projection of the protruding region on the
substrate film in a direction parallel to the dividing line to a
size of the orthographic projection of the main body region on the
substrate film in the direction parallel to the dividing line is
within a range of 0.15 to 1.
[0015] According to some exemplary embodiments, the size of the
orthographic projection of the protruding region on the substrate
film in the direction perpendicular to the dividing line is about
13.4 mm; and/or the size of the orthographic projection of the main
body region on the substrate film in the direction perpendicular to
the dividing line is about 13.5 mm.
[0016] According to some exemplary embodiments, the main body
region includes a first sub-circuit board and a second sub-circuit
board; or the main body region includes a first sub-circuit board,
a second sub-circuit board and a third sub-circuit board; or the
main body region includes a first sub-circuit board, a second
sub-circuit board, a third sub-circuit board and a fourth
sub-circuit board.
[0017] According to some exemplary embodiments, the main body
region includes the first sub-circuit board, the second sub-circuit
board, the third sub-circuit board, the fourth sub-circuit board
and a bonding film, the fourth sub-circuit board includes a
substrate film, a conductive film arranged on a side of the
substrate film and an adhesive layer for pasting the substrate film
and the conductive film, each of the second sub-circuit board and
the third sub-circuit board includes a substrate film, conductive
films arranged on opposite sides of the substrate film, and
adhesive layers for pasting the substrate film and the conductive
films, the bonding film is provided between the first sub-circuit
board and the second sub-circuit board, between the second
sub-circuit board and the third sub-circuit board, and between the
third sub-circuit board and the fourth sub-circuit board.
[0018] According to some exemplary embodiments, the pressure sensor
includes a first electrode and a second electrode located in a same
conductive film.
[0019] According to some exemplary embodiments, a material of the
first electrode and a material of the second electrode include
copper.
[0020] According to some exemplary embodiments, a material of the
substrate film and a material of the cover layer include
polyimide.
[0021] In another aspect, a display device including the flexible
printed circuit described above is provided.
[0022] In another aspect, a display device is provided, and the
display device includes: the flexible printed circuit described
above; a display panel; and a battery, wherein an orthographic
projection of the battery on the display panel is spaced from an
orthographic projection of the main body region on the display
panel, and the orthographic projection of the battery on the
display panel at least partially overlaps an orthographic
projection of the protruding region on the display panel.
[0023] According to some exemplary embodiments, the orthographic
projection of the battery on the display panel at least partially
overlaps an orthographic projection of the pressure sensor on the
display panel.
[0024] According to some exemplary embodiments, the display device
further includes a spacer member arranged on a side of the display
panel facing the pressure sensor, wherein the electromagnetic
shielding layer is in contact with the spacer member.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly explain the embodiments of the
present disclosure or the technical solutions in a related art, the
following will briefly introduce the accompanying drawings required
in the embodiments or the description of the related art.
Obviously, the drawings in the following description are only some
embodiments of the present disclosure. For those ordinary skilled
in the art, other drawings may be obtained based on these drawings
without paying any inventive effort.
[0026] FIG. 1 shows a schematic diagram of a display device
according to some embodiments of the present disclosure.
[0027] FIG. 2 shows a partially exploded schematic diagram of a
display device provided by some embodiments of the present
disclosure.
[0028] FIG. 3A and FIG. 3B respectively show schematic
cross-sectional views of the display device according to some
embodiments of the present disclosure taken along line I-I' of FIG.
2.
[0029] FIG. 4 shows a schematic plan view of a flexible printed
circuit according to some exemplary embodiments of the present
disclosure, in which a connection between the flexible printed
circuit and the display panel is shown.
[0030] FIG. 5 shows a schematic plan view of a flexible printed
circuit according to some exemplary embodiments of the present
disclosure.
[0031] FIG. 6A to FIG. 6C respectively show cross-sectional views
of the flexible printed circuit according to some embodiments of
the present disclosure taken along line II-II' in FIG. 5.
[0032] FIG. 7A shows a perspective view of an inductive type
pressure sensor according to some exemplary embodiments of the
present disclosure.
[0033] FIG. 7B shows a perspective view of a piezoelectric type
pressure sensor according to some exemplary embodiments of the
present disclosure.
[0034] FIG. 8 shows a partial enlarged view of the display device
according to some exemplary embodiments of the present disclosure
at part III of FIG. 1.
[0035] FIG. 9 shows a schematic plan view of a flexible printed
circuit according to some exemplary embodiments of the present
disclosure.
[0036] FIG. 10A and FIG. 10B respectively show partial enlarged
views of the flexible printed circuit according to some exemplary
embodiments of the present disclosure at part IV of FIG. 9.
[0037] FIG. 11 shows a schematic cross-sectional view of the
flexible printed circuit according to some exemplary embodiments of
the present disclosure taken along line VV' in FIG. 9.
[0038] FIG. 12 shows a schematic plan view of the display device
shown in FIG. 1.
[0039] FIG. 13 shows a cross-sectional view of a display device
according to some exemplary embodiments of the present
disclosure.
DETAILED DESCRIPTION OF EMBODIMENTS
[0040] In order to make objectives, technical solutions and
advantages of the present disclosure more apparent, the technical
solutions of the present disclosure are clearly and completely
described below with reference to the drawings of the embodiments
of the present disclosure. Obviously, the described embodiments are
only a part but not all of the embodiments of the present
disclosure. Based on the embodiments of the present disclosure, all
other embodiments obtained by those ordinary skilled in the art
without carrying out inventive effort fall within the protection
scope of the present disclosure.
[0041] Unless otherwise defined, technical terms or scientific
terms used in the present disclosure shall be of the general
meaning understood by the ordinary skilled in the art. The words
"first," "second," and the like used in the present disclosure do
not denote any order, quantity or importance, but are used to
distinguish different components. The words "comprising,"
"including" and the like indicate that the element or item
preceding the word contains the elements or items listed following
the word as well as the equivalents, but do not exclude other
elements or items. The words "connected," "coupled," or the like
are not limited to physical or mechanical connections, but may
include electrical connections, whether direct or indirect. The
words "upper", "lower", "left", "right" and the like are only used
to indicate relative positional relationship, and when the absolute
position of the object described is changed, the relative
positional relationship may also be correspondingly changed.
[0042] Herein, unless otherwise clearly specified and limited, the
term "connected" may be understood in a broad sense, for example,
"connected" may refer to a fixed connection, a detachable
connection, or be connected into one; and may refer to a direct
connection or an indirect connection through an intermediary.
[0043] Herein, unless otherwise specified and limited, the number
of layers in the expressions "single-layer board", "double-layer
board", "four-layer board", "six-layer board", etc. refers to the
number of layers of the conductive film in the flexible printed
circuit. For example, the "single-layer board" is provided with one
layer of conductive film, the "double-layer board" is provided with
two layers of conductive film, the "four-layer board" is provided
with four layers of conductive film, and the "six-layer board" is
provided with six layers of conductive film.
[0044] Herein, unless otherwise clearly specified and limited, the
term "continuously extending" means that one component extends from
another component, or that the two components are formed as a
whole.
[0045] It should be noted that herein, unless otherwise specified
and limited, the expression "thickness" means a size in a direction
perpendicular to a display surface of a display panel.
[0046] Embodiments of the present disclosure provide a flexible
printed circuit and a display device. The flexible printed circuit
includes: a plurality of sub-circuit boards arranged in a stack, in
which the plurality of sub-circuit boards includes at least a first
sub-circuit board and a second sub-circuit board; and a pressure
sensor arranged on the first sub-circuit board. The first
sub-circuit board includes: a substrate film; a conductive film
arranged on a side of the substrate film away from the second
sub-circuit board; an adhesive layer arranged on a side of the
conductive film away from the substrate film; a cover layer
arranged on a side of the adhesive layer away from the substrate
film; and an electromagnetic shielding layer arranged on a side of
the cover layer away from the substrate film. At least a part of
the conductive film is formed as an electrode of the pressure
sensor. In the embodiments of the present disclosure, the electrode
of the pressure sensor is arranged on the conductive film of the
multi-layer board, which is beneficial to reduce a space occupied
by the pressure sensor, and thus facilitates an installation of a
large-capacity battery.
[0047] It should be understood that multiple signal lines may
generally be integrated on the flexible printed circuit to transmit
different types of signals. When many types of signal lines are
provided on the flexible printed circuit, for example, when
multiple signal lines for display signals, touch signals,
fingerprint recognition signals, etc. are required at the same
time, a difficulty of wiring the signal lines in the flexible
printed circuit may increase. In this regard, at least a part of
the flexible printed circuit may be formed to include a plurality
of wiring layers, such as four or six wiring layers, etc., so as to
facilitate an arrangement of multiple lines. In this way, multiple
lines may be distributed in different layers, which may reduce a
mutual interference between different types of lines. In addition,
in a process of producing the flexible printed circuit with a
plurality of wiring layers, it is also necessary to form an
insulating layer (and a corresponding adhesive layer) between
adjacent wiring layers. In order to avoid a signal crosstalk
between different wiring layers, it may be necessary to form a
(electromagnetic signal) shielding layer between different
lines.
[0048] The embodiments of the present disclosure provide a display
device, and a type of the display device is not limited. The
display device may be a liquid crystal display (LCD) or an
electroluminescent display device. In a case that the display
device is an electroluminescent display device, the
electroluminescent display device may be an organic
electroluminescent display device (e.g., Organic Light-Emitting
Diode (OLED)) or a quantum dot electroluminescent display device
(e.g., Quantum Dot Light Emitting Diodes (QLED)).
[0049] FIG. 1 shows a schematic diagram of a display device. As
shown in FIG. 1, a main structure of the display device includes a
frame 1, a cover plate 2, a display panel 3, and a flexible printed
circuit 4. In a case that the display device is a liquid crystal
display device, the display device may further include a backlight
assembly. Here, the display panel 3 may be a flexible display panel
or a rigid display panel. In a case that the display panel 3 is a
flexible display panel, the display device is a flexible display
device.
[0050] For example, an upper side of the display panel 3 shown in
FIG. 1 is a display side, and a lower side is a non-display side.
After being bonded, the flexible printed circuit 4 is bent and
placed on the non-display side of the display panel 3, that is,
bent to a back surface of the display panel 3, so as to achieve a
large-screen design of a display screen.
[0051] For example, the display device provided by the embodiments
of the present disclosure may be any product or component with a
display function, such as a television, a digital camera, a mobile
phone, a tablet computer, and so on.
[0052] As shown in FIG. 1, the frame 1 has a U-shaped longitudinal
section. The display panel 3, the flexible printed circuit 4 and
other accessories are arranged in the frame 1. The flexible printed
circuit 4 is arranged under the display panel 3 (that is, on the
back surface which is away from a display surface of the display
panel 3). The cover plate 2 is arranged on a side of the display
panel 3 away from the flexible printed circuit 4. In a case that
the display is a liquid crystal display including a backlight
assembly, the backlight assembly is arranged between the display
panel 3 and the flexible printed circuit 4.
[0053] As shown in FIG. 1, the display panel 3 may include a
display unit 31 and a touch layer 32. The touch layer 32 may be
arranged on a light exit side of the display unit 31. Exemplarily,
in a case that the display panel 3 is an OLED display panel, the
touch layer 32 may be arranged on an encapsulation layer of the
OLED display panel (the touch layer 32 may be in direct contact
with the encapsulation layer, or other layers such as a
planarization layer may be provided between the touch layer and the
encapsulation layer). The encapsulation layer may be an
encapsulation substrate or an encapsulation film. In a case that
the display panel 3 is a liquid crystal display panel, the touch
layer 32 may be embedded in a liquid crystal layer (i.e., In cell),
or the touch layer 32 may be arranged between a color filter
substrate and an upper polarizer (i.e., On cell). A position of the
touch layer 32 is not limited to this. For example, the touch layer
32 may also be arranged inside the display panel 3. Exemplarily,
the touch layer 32 may be arranged on a side of the cover plate 2
close to the display panel 3.
[0054] FIG. 2 shows a partially exploded schematic diagram of a
display device provided by some embodiments of the present
disclosure. Referring to FIG. 1 and FIG. 2 in combination, the
display unit 31 may include a display region AA and a non-display
region NA located on at least one side of the display region AA. In
FIG. 2, the non-display region NA surrounding the display region AA
is illustrated by way of example. The display region AA may be
defined as an area in which an image is displayed, and the display
region AA may include a plurality of sub-pixels for obtaining an
image. The non-display region NA may be defined as an area in which
no image is displayed, and the non-display region NA is used for
wiring. For example, a gate driving circuit may be provided in the
non-display region NA. In other words, the non-display region may
also be referred to as a wiring region or a border.
[0055] In a case that the display panel 3 includes the touch layer
32, the touch layer 32 may be provided on the display unit 31. The
touch layer 32 may acquire coordinate information from an external
input (for example, user's finger touch). That is, the touch layer
32 may be a touch panel for sensing user's touch, or may be a
fingerprint sensing panel for acquiring fingerprint information of
user's finger. For example, the touch layer 32 may sense the
external input by a capacitive manner. It should be noted that the
sensing manner of the touch layer 32 in the embodiments of the
present disclosure includes but is not limited to the
implementations described above, and other suitable sensing manners
may fall within the scope of protection of the embodiments of the
present disclosure.
[0056] FIG. 3A and FIG. 3B respectively show schematic
cross-sectional views of the display device according to some
embodiments of the present disclosure taken along line I-I' of FIG.
2. In some embodiments, referring to FIG. 3A, the touch layer 32
may be formed on the display unit 31 through a continuous process.
That is, the touch layer 32 may be formed directly on the display
unit 31 after the display unit 31 is formed. Referring to FIG. 3A,
for example, when forming the touch layer 32 in an
electroluminescent display device, the touch layer 32 may be formed
directly on the encapsulation layer 33. In addition, in order to
avoid damaging the encapsulation layer 33 when forming the touch
layer 32 on the encapsulation layer 33, a buffer layer 34 may be
formed on the encapsulation layer 33 before forming the touch layer
32 on the encapsulation layer 33. In other embodiments, referring
to FIG. 3B, the touch layer 32 may be formed as a separate element,
and the touch layer 32 may be pasted on the display unit 31 by
using an adhesive layer 35. In a case that the touch layer 32 is
formed as a separate element (for example, a separate film layer),
the touch layer 32 may further include a carrier film for carrying
a touch electrode. For example, in the embodiment shown in FIG. 3B,
the touch layer 32 may include a touch electrode layer 321 and a
carrier film 320 for carrying the touch electrode layer.
[0057] For example, the carrier film 320 may be a resin film, a
glass substrate, a composite film, etc. The adhesive layer 35 may
be a pressure sensitive adhesive (PSA), an optical clear adhesive
(OCA), an optical clear resin (OCR), or the like.
[0058] It should be noted that, in the embodiment shown in FIG. 2,
the display panel 3 may have a rectangular shape in the plan view.
The "rectangular shape" here includes not only a substantially
rectangular shape, but also a shape similar to a rectangle in
consideration of process conditions. On this basis, the display
panel 3 has a long side and a short side. In some embodiments, the
long side and the short side of the display panel 3 form a right
angle at each intersection position (that is, at a corner). In
other embodiments, the corner of the display panel 3 is curved,
that is, the corner is smooth.
[0059] In combination with the above embodiments, referring to FIG.
2, the touch layer 32 may overlap the display unit 31. In some
embodiments, the touch layer 32 may have substantially the same
size as the display unit 31. That is, as shown in FIG. 3A and FIG.
3B, the sides of the touch layer 32 may be aligned with the sides
of the display unit 31, but the embodiments of the present
disclosure are not limited to this. Optionally, the touch layer 32
may only overlap a part of the display unit 31, for example, the
touch layer 32 may at least partially overlap the display region AA
of the display unit 31.
[0060] It should be noted that the touch layer 32 may include a
touch region B1 provided with a plurality of touch electrodes and a
peripheral region B2 arranged at a periphery of the touch region B1
and provided with touch leads electrically connected to the touch
electrodes. In a case that the touch layer 32 has substantially the
same size as the display unit 31, the touch region B1 corresponds
to the display region AA, and the peripheral region B2 corresponds
to the non-display region NA.
[0061] On this basis, as shown in FIG. 2, the cover plate 2 may
include a light-transmitting region C 1 and a light-shielding
region C2. The light-transmitting region C1 may at least partially
overlap the display region AA of the display unit 31, and the
light-transmitting region C1 may transmit the light generated from
the display unit 31 to the outside so as to be viewed by human
eyes. The light-shielding region C2 may be arranged at a periphery
of the light-transmitting region C1, and may at least partially
overlap the non-display region NA of the display unit 31.
[0062] FIG. 4 shows a schematic plan view of a flexible printed
circuit according to some exemplary embodiments of the present
disclosure, in which a connection between the flexible printed
circuit and the display panel is shown. FIG. 5 shows a schematic
plan view of a flexible printed circuit according to some exemplary
embodiments of the present disclosure. As shown in FIG. 2, FIG. 4
and FIG. 5 in combination, the flexible printed circuit 4 may be
bent along line AL toward the non-display side of the display panel
3, so that the flexible printed circuit 4 is located on the back
surface of the display panel 3. The flexible printed circuit 4 may
include a bonding region 41, a main body region 42 and an extending
region 43. The extending region 43 and the bonding region 41 are
located on opposite sides of the main body region 42,
respectively.
[0063] The bonding region 41 of the flexible printed circuit 4 may
include a plurality of bonding pins 411. The non-display region NA
of the display panel 3 may include a plurality of bonding pads. The
plurality of bonding pins 411 are respectively bonded to the
plurality of bonding pads so as to realize the bonding of the
flexible printed circuit 4 and the display panel 3.
[0064] For example, in some embodiments, as shown in FIG. 4, the
non-display region NA of the display panel 3 further includes a
driving circuit IC 37. Data signals, power signals and so on
transmitted by the main board are transmitted to the driving
circuit IC 37 through the lines on the flexible printed circuit 4
(which may be collectively referred to as, for example, data signal
control lines), and then processed by the driving circuit IC 37,
and finally output to the display panel 3, so as to drive the
display panel 3 for display.
[0065] The main body region 42 of the flexible printed circuit 4
may include one or more driving devices, such as a display driving
device D1 and/or a touch driving device D2. The main body region 42
of the flexible printed circuit 4 may further include one or more
lines. For example, the lines may include a first line L1, a second
line L2, and a third line L3. Exemplarily, the first line L1 may be
a signal line for transmitting data required for display, the
second line L2 may be a power line L2, and the third line L3 may be
a touch line L3. The signal line L1 may be electrically connected
to the display driving device D1, and the touch line L3 may be
electrically connected to the touch driving device D2.
[0066] For example, the driving device may include a driving IC
chip. The driving IC chip may be integrated to the flexible printed
circuit 4 by a plurality of manners (i.e., packaging manners), such
as Tape Carrier Package (TCP), Chip on Film (COF) package, and the
like. In the TCP manner, the flexible printed circuit may include a
plurality of contact pads, and a plurality of pins of the driving
IC chip are soldered to the plurality of contact pads of the
flexible printed circuit in a one-to-one correspondence (such as
eutectic soldering), or electrically connected to the plurality of
contact pads in a one-to-one correspondence through anisotropic
conductive film (ACF), and a soldered portion is protected by, for
example, at least an epoxy resin. In order to increase a
bendability of the flexible printed circuit in the TCP manner, a
slit may be formed in a packaging portion. In the COF packaging
manner, the flexible printed circuit may include a plurality of
contact pads, and the plurality of pins of the driving IC chip are
directly crimped on the plurality of contact pads of the flexible
printed circuit through ACF, so that the plurality of pins of the
driving IC chip are electrically connected to the plurality of
contact pads of the flexible printed circuit in a one-to-one
correspondence. For example, a size and an arrangement of the
contact pads on the flexible printed circuit for combining with the
driving IC chip may be adjusted according to different packaging
manners or the driving IC chip to be packaged. For example, the
contact pads may be arranged in a long strip or in a rectangle. The
embodiments of the present disclosure do not limit the manner of
packaging the driving IC chip.
[0067] It should be noted that the number of the first line L1, the
number of the second line L2, and the number of the third line L3
are not limited, and each may be one or more. Here, "more" may be
at least two, for example.
[0068] Continuing to refer to FIG. 4 and FIG. 5, one or more lines
included in the main body region 42 may extend to the extending
region 43 and may be electrically connected to the main board
through a bonding region or a golden finger included in the
extending region 43. For example, the first line L1 and the second
line L2 may extend to the extending region 43. In this way, the
data signals, power signals, etc. transmitted by the main board may
be transmitted to the display panel 3 through the lines on the
flexible printed circuit 4.
[0069] In the embodiments of the present disclosure, the flexible
printed circuit 4 may include a pressure sensor 10. The pressure
sensor 10 may be used to acquire touch pressure information about a
user's touch operation. For example, the pressure sensor 10 may
acquire information indicating whether the user's touch operation
involves pressure or not. In a non-limiting example, the pressure
sensor 10 may acquire information about a magnitude of a touch
pressure.
[0070] FIG. 6A to FIG. 6C respectively show cross-sectional views
of a flexible printed circuit according to some embodiments of the
present disclosure taken along line II-II' in FIG. 5. As shown in
FIG. 6A to FIG. 6C, in some embodiments, the main body region 42
has a multi-layer board structure.
[0071] For example, as shown in FIG. 6A, the main body region 42
may include a first sub-circuit board 51 and a second sub-circuit
board 52. As shown in FIG. 6B, the main body region 42 may include
a first sub-circuit board 51, a second sub-circuit board 52 and a
third sub-circuit board 54.
[0072] For example, as shown in FIG. 6C, the main body region 42
has a six-layer board structure.
[0073] As shown in FIG. 6C, the six-layer board structure of the
main body region 42 may be a combination of "1 layer+2 layers+2
layers+1 layer". The main body region 42 may include a first
sub-circuit board 51, a second sub-circuit board 52, a third
sub-circuit board 54, a fourth sub-circuit board 55 and a bonding
film 53. For example, each sub-circuit board may be a copper clad
laminate. The bonding film 53 may contain an adhesive material such
as PP glue for bonding two adjacent sub-circuit boards. For
example, a plurality of sub-circuit boards are bonded and pressed
to form a fixed connection as a whole functional unit.
[0074] The first sub-circuit board 51 may include: a substrate film
511; a conductive film 512 arranged on a side of the substrate film
511; an adhesive layer 513 arranged on a side of the conductive
film 512 away from the substrate film 511; a cover layer 514
arranged on a side of the adhesive layer 513 away from the
substrate film 511; and an electromagnetic shielding layer 515
arranged on a side of the cover layer 514 away from the substrate
film 511. For example, at least a part of the conductive film 512
may be formed as an electrode of the pressure sensor 10.
[0075] For example, the substrate film and the cover layer
described above may include a flexible material such as polyimide
or polyester. A material of the electromagnetic shielding layer is
not particularly limited, as long as it has predetermined rigidity
and strength and has heat transfer and electromagnetic shielding
functions. For example, the electromagnetic shielding layer may
include copper (Cu), nickel (Ni), ferrite, silver (Ag), or alloys
thereof. For another example, the electromagnetic shielding layer
may include one or more of conductive rubber, conductive cloth,
conductive foam, and conductive shielding glue. By providing the
electromagnetic shielding layer, an interference of external
signals to the signals transmitted by various lines on the flexible
printed circuit and to the pressure sensor may be shielded.
[0076] In this embodiment, the first sub-circuit board 51 has a
single-layer board structure, and the pressure sensor 10 is
arranged on the single-layer board. With such a design, a thickness
of the flexible printed circuit at the pressure sensor may be
reduced.
[0077] In the embodiments of the present disclosure, several
exemplary embodiments of the electrode of the pressure sensor 10
will be described with reference to FIG. 7A and FIG. 7B
respectively. However, it should be understood that the pressure
sensor 10 according to the embodiments of the present disclosure is
not limited thereto. The pressure sensor 10 may be configured as
any one of an electrostatic type, an inductive type, a strain gauge
type, a piezoelectric type, and a capacitive type according to an
operation method thereof.
[0078] For example, FIG. 7A shows a perspective view of an
inductive type pressure sensor according to some exemplary
embodiments of the present disclosure. The pressure sensor 10 may
be an inductive type pressure sensor. Referring to FIG. 7A, the
inductive type pressure sensor 10' may include a plurality of
electrodes 101'. For example, the electrode 101' may be an
inductor, such as a coil. When the pressure sensor 10' operates, as
a pressure applied by the user changes, a current induced in the
electrode 101' may change accordingly. For example, when a
conductor (e.g., a metal housing or a user's finger) approaches the
electrode 101' due to the pressure applied by the user, the current
induced in the electrode 101' may increase. The pressure sensor 10'
may sense the pressure based on the change of current.
[0079] For example, the pressure sensor 10 may be a strain gauge
type pressure sensor. Referring to FIG. 7A, the strain gauge type
pressure sensor 10' may include an electrode 101'. When the strain
gauge type pressure sensor 10' operates, as the pressure applied by
the user changes, a length of the electrode 101' may change, and a
resistance of the electrode 101' may also change accordingly. For
example, when the pressure applied by the user increases, the
resistance of the electrode 101' may increase accordingly. The
pressure sensor 10' may sense the pressure based on the change of
resistance.
[0080] For example, FIG. 7B shows a perspective view of a
piezoelectric type pressure sensor according to some exemplary
embodiments of the present disclosure. The pressure sensor 10 may
be a piezoelectric type pressure sensor. Referring to FIG. 7B, the
piezoelectric type pressure sensor 10'' may include an electrode
101'', and the electrode 101'' may be formed of a piezoelectric
material. When the piezoelectric type pressure sensor 10''
operates, as the pressure applied by the user changes, the current
of the electrode 101'' converted due to a piezoelectric effect
(that is, an induced current) may change accordingly. For example,
when the pressure applied by the user increases, the converted
current (i.e., the induced current) of the electrode 101'' may
increase. The pressure sensor 10'' may sense the pressure based on
the change of induced current.
[0081] In the embodiments of the present disclosure, the electrode
101', 101'' may be arranged in the conductive film 512. In other
words, at least a part of the conductive film 512 may be formed as
the above-mentioned electrode of the pressure sensor 10.
[0082] For example, the pressure sensor 10 may be implemented as a
self-capacitance type or a mutual-capacitance type, and at least a
part of the conductive film 512 may be formed as an electrode of
the pressure sensor 10. In some embodiments of the present
disclosure, the conductive film 512 may include copper, that is,
the conductive film 512 is a copper film layer.
[0083] Referring back to FIG. 6C, the second sub-circuit board 52
may include a substrate film 521, conductive films 522 arranged on
opposite sides of the substrate film 521, and adhesive layers 523
for pasting the substrate film 521 and the conductive films 522.
The third sub-circuit board 54 may include a substrate film 541,
conductive films 542 arranged on opposite sides of the substrate
film 541, and adhesive layers 543 for pasting the substrate film
541 and the conductive films 542. The fourth sub-circuit board 55
may include a substrate film 551, a conductive film 552 arranged on
a side of the substrate film 551, and an adhesive layer 553 for
pasting the substrate film 551 and the conductive film 552. The
bonding film 53 is arranged between the first sub-circuit board 51
and the second sub-circuit board 52, between the second sub-circuit
board 52 and the third sub-circuit board 54, and between the third
sub-circuit board 54 and the fourth sub-circuit board 55.
[0084] For example, the substrate film described above may include
a flexible material such as polyimide or polyester.
[0085] FIG. 8 shows a partial enlarged view of the display device
according to some exemplary embodiments of the present disclosure
at part III of FIG. 1. Referring to FIG. 1, FIG. 6C and FIG. 8 in
combination, at least a part of the flexible printed circuit 4 may
be bent to the back surface of the display panel, so that the
pressure sensor 10 is located on the back surface of the display
panel 3.
[0086] As shown in FIG. 8, a spacer member 20 is provided on the
back surface of the display panel 3. The spacer member 20 is
arranged between the back surface of the display panel 3 and the
flexible printed circuit 4. The spacer member 20 may reduce or
eliminate a damage to the display panel 3 caused by an external
impact. The spacer member 20 may absorb or disperse at least part
of the external impact, and thus may protect the display panel 3. A
material of the spacer member 20 is not particularly limited, as
long as it is suitable for absorbing and/or dispersing impact. For
example, the spacer member 20 may include polymer materials such as
polyurethane-based resins, carbonate-based resins, propylene-based
resins or ethylene-based resins, or rubber-based materials or
foamed products thereof. For example, the spacer member 20 may
include foam.
[0087] Referring to FIG. 6C and FIG. 8 in combination, when the
flexible printed circuit 4 is bent to the back surface of the
display panel 3, the first circuit sub-board 51 may be in contact
with the spacer member 20. For example, the electromagnetic
shielding layer 515 may be in contact with a surface of the spacer
member 20 away from the display panel 3 (i.e., a lower surface of
the spacer member 20 in FIG. 8).
[0088] In the embodiments of the present disclosure, a distance
between the conductive film 512 and the electromagnetic shielding
layer 515, that is, a separation distance between the conductive
film 512 and the electromagnetic shielding layer 515 in a direction
perpendicular to the display panel 3, is within a specified
distance range. The specified distance range may be 34.5 microns to
40.5 microns. In this way, the pressure sensor 10 may operate
normally.
[0089] An adhesive layer 513 and a cover layer 514 are provided
between the conductive film 512 and the electromagnetic shielding
layer 515. In the embodiments of the present disclosure, a
thickness of the adhesive layer 513 may be designed so that the
distance between the conductive film 512 and the electromagnetic
shielding layer 515 is within the specified distance range
described above. The thickness of the adhesive layer 513 may be
designed to be 20 microns to 30 microns, for example, about 25
microns, so that the distance between the conductive film 512 and
the electromagnetic shielding layer 515 is within the range of 34.5
microns to 40.5 microns.
[0090] FIG. 9 shows a schematic plan view of a flexible printed
circuit according to some exemplary embodiments of the present
disclosure. FIG. 10A and FIG. 10B respectively show partial
enlarged views of the flexible printed circuit according to some
exemplary embodiments of the present disclosure at part IV of FIG.
9. FIG. 11 shows a schematic cross-sectional view of the flexible
printed circuit according to some exemplary embodiments of the
present disclosure taken along line VV' in FIG. 9.
[0091] Hereinafter, special features of some embodiments of the
present disclosure will be described mainly in conjunction with
FIG. 9 to FIG. 11. It should be understood that in a case of no
conflict, these embodiments may utilize all the structures in the
above-mentioned embodiments
[0092] As shown in FIG. 9 to FIG. 11, the flexible printed circuit
4 may include a bonding region 41, a main body region 42, a
protruding region 45 and an extending region 43. The protruding
region 45 and the extending region 43 are located on a same side of
the main body region 42, and the bonding region 41 and each of the
protruding region 45 and the extending region 43 are respectively
located on opposite sides of the main body region 42.
[0093] Referring to FIG. 11, the main body region 42 of the
flexible printed circuit 4 has a thickness greater than that of the
protruding region 45. For example, the main body region 42 may have
a six-layer board structure, and the protruding region 45 may have
a single-layer board structure. That is, in the embodiments of the
present disclosure, the number of layers of the main body region 42
is greater than the number of layers of the protruding region 45,
so that the protruding region 45 is formed as a thinned area with
respect to the main body region 42.
[0094] As described above, the six-layer board structure of the
main body region 42 may be a combination of "1 layer+2 layers+2
layers+1 layer". The main body region 42 may include the first
sub-circuit board 51, the second sub-circuit board 52, the third
sub-circuit board 54, the fourth sub-circuit board 55 and the
bonding film 53. The protruding region 45 may be led out from the
first sub-circuit board 51. That is, the first sub-circuit board 51
may protrude from the main body region 42, and a protruding portion
of the first sub-circuit board 51 is formed as the protruding
region 45.
[0095] In the embodiments of the present disclosure, the pressure
sensor 10 may be arranged in the protruding region 45.
[0096] For example, the pressure sensor 10 may include a first
electrode 101 and a second electrode 102. The first electrode 101
and the second electrode 102 may be located in a same conductive
film, that is, both are located in the conductive film 512.
[0097] For example, the first electrode 101 and the second
electrode 102 of the pressure sensor 10 may be the electrode 101'
or the electrode 101'' described above. In some embodiments, the
first electrode 101 and the second electrode 102 may sense pressure
based on the change of resistance. For example, as the pressure
applied by the user changes, the length of the electrode 101' may
change, and the resistance of the electrode 101' may also change
accordingly. The pressure sensor 10 may sense the pressure based on
the change of resistance. In some embodiments, the first electrode
101 and the second electrode 102 may sense the pressure based on
the change of capacitance. For example, as the pressure applied by
the user changes, a capacitance between the first electrode 101 and
a touch subject and a capacitance between the second electrode 102
and the touch subject also change. The pressure sensor 10 may sense
the pressure based on the change of capacitance. An operating
principle and method of the pressure sensor 10 may be referred to
the above description for FIG. 7A and FIG. 7B.
[0098] It should be noted that the pressure sensor 10 in the
embodiments of the present disclosure is not limited to the above
types, and various types of pressure sensors known in the related
art may be used.
[0099] In the embodiments of the present disclosure, the pressure
sensor 10 may be integrated into a display device such as a mobile
phone, a computer, etc., which may be used to sense a magnitude of
the pressure of the touch subject (such as a user's finger)
pressing the display screen, so as to control the display device to
perform different operations based on different pressures.
[0100] Each of an orthographic projection of the main body region
42 on the display panel or the substrate film and an orthographic
projection of the protruding region 45 on the display panel or the
substrate film has a rectangular shape. The "rectangular shape"
here includes not only a substantially rectangular shape, but also
a shape similar to a rectangle in consideration of process
conditions. On this basis, the main body region 42 has a long side
and a short side. In some embodiments, the long side and the short
side of the main body region 42 form a right angle at each
intersection position (that is, at a corner). In other embodiments,
the corner of the main body region 42 is curved, that is, the
corner is smooth.
[0101] As shown in FIG. 9, a direction in which the short side of
the main body region 42 extends is defined as a first direction A1,
and a direction in which the long side extends is defined as a
second direction A2.
[0102] As shown in FIG. 11, the protruding region 45 may include: a
substrate film 511; a conductive film 512 arranged on a side of the
substrate film 511; an adhesive layer 513 arranged on a side of the
conductive film 512 away from the substrate film 511; a cover layer
514 arranged on a side of the adhesive layer 513 away from the
substrate film 511; and an electromagnetic shielding layer 515
arranged on a side of the cover layer 514 away from the substrate
film 511. For example, at least a part of the conductive film 512
may be formed as an electrode of the pressure sensor 10. For the
structure of the pressure sensor 10, reference may be made to the
description in each of the above embodiments, which will not be
repeated here.
[0103] In the embodiments of the present disclosure, the pressure
sensor 10 may be arranged on the protruding portion 45 of the
flexible printed circuit 4, that is, in the protruding thinned
region.
[0104] An orthographic projection of the main body region 42 on the
substrate film 511 is adjacent to an orthographic projection of the
protruding region 45 on the substrate film 511, and the
orthographic projection of the main body region 42 on the substrate
film 511 has an area greater than that of the orthographic
projection of the protruding region 45 on the substrate film
511.
[0105] The protruding region 45 protrudes from a side surface 425
of the main body region 42, and an orthographic projection of the
side surface 425 on the substrate film 511 is formed as a dividing
line JL.
[0106] A ratio of a size H1 of the orthographic projection of the
protruding region 45 on the substrate film 511 in a direction
perpendicular to the dividing line JL (that is, the direction A1 in
FIG. 9) to a size H2 of the orthographic projection of the main
body region 42 on the substrate film 511 in the direction
perpendicular to the dividing line is within a range of 0.5 to 1.5.
For example, the size H1 of the orthographic projection of the
protruding region 45 on the substrate film 511 in the direction
perpendicular to the dividing line is about 13.4 mm; and/or the
size H2 of the orthographic projection of the main body region 42
on the substrate film 511 in the direction perpendicular to the
dividing line is about 13.5 mm
[0107] For example, a ratio of a size W1 of the orthographic
projection of the protruding region 45 on the substrate film 511 in
a direction parallel to the dividing line JL (that is, the
direction A2 in FIG. 9) to a size W2 of the orthographic projection
of the main body region 42 on the substrate film 511 in the
direction parallel to the dividing line is within a range of 0.15
to 1.
[0108] For example, an orthographic projection of an area where the
pressure sensor 10 is located on the substrate film 511 has a
substantially rectangular shape with a size W3 of about 15 mm in
the direction A2 and a size H3 of about 10 mm in the direction
A1.
[0109] The orthographic projection of the main body region 42 on
the substrate film 511 has a substantially rectangular shape with a
size of about 58 mm in the direction A2 and a size of about 13.5 mm
in the direction A1.
[0110] FIG. 12 shows a schematic plan view of the display device
shown in FIG. 1. FIG. 13 shows a cross-sectional view of a display
device according to some exemplary embodiments of the present
disclosure. Referring to FIG. 1 to FIG. 13 in combination, the
display device may further include a battery 6. The battery 6 may
supply power to various components of the display device.
[0111] It should be noted that the expression "battery" herein may
include any form of power storage components, including but not
limited to lithium battery, battery compartment with protective
housing, and the like. For example, the battery 6 may include: a
battery bag containing battery cells, a protective circuit module
(PCM) (for example, circuit board) connection for electrically
connecting a terminal pulled out from the battery bag, and a
housing for protecting the PCM (for example, a PCM housing).
According to various embodiments, the housing for containing the
PCM may be fixed to the battery bag as an assembly structure for
improving impact resistance, so that the components of a
rechargeable battery (for example, battery bag, PCM, or terminal)
may be prevented from being damaged even when an external impact is
applied to the electronic device.
[0112] An orthographic projection of the battery 6 on the display
panel 3 does not overlap the orthographic projection of the main
body region 42 on the display panel 3. The main body region 42 has
a thick six-layer board structure, and the battery 6 does not
extend below the main body region 42.
[0113] The orthographic projection of the battery 6 on the display
panel 3 at least partially overlaps the orthographic projection of
the protruding region 45 on the display panel 3.
[0114] The orthographic projection of the battery 6 on the display
panel 3 at least partially overlaps the orthographic projection of
the pressure sensor 10 on the display panel 3. For example, the
orthographic projection of the battery 6 on the display panel 3
covers the orthographic projection of the pressure sensor 10 on the
display panel 3.
[0115] In the embodiments of the present disclosure, by designing
the protruding region 45 thinner than the main body region 42, the
battery 6 may extend below the protruding region 45. In this way,
an area of the battery 6 equipped with the display device may be
increased, and accordingly, a capacity of the battery 6 may be
increased.
[0116] The pressure sensor 10 and the main body region 42 are
spaced apart, that is, the orthographic projection of the pressure
sensor 10 on the display panel 3 is spaced from the orthographic
projection of the main body region 42 on the display panel 3.
Accordingly, the protruding region 45 further includes a transition
region 452. As shown in FIG. 9, the transition region 452 is
located between the pressure sensor 10 and the main body region
42.
[0117] For example, an orthographic projection of the transition
region 452 on the substrate film 511 has a substantially
rectangular shape with a size of about 15 mm in the direction A2
and a size of about 3 mm in the direction A1.
[0118] In the embodiments of the present disclosure, the transition
region 452 may be used as a wiring region. As shown in FIG. 9, at
least some of the lines (for example, the first line L1, the second
line L2, and the third line L3) may be arranged in the transition
region 452. In this way, the area of the main body region 42 may be
further reduced, for example, a width of the main body region 42
(the size in the direction A1 in FIG. 9) may be reduced, so that
the capacity of the battery 6 may be further increased.
[0119] In the embodiments of the present disclosure, the pressure
sensor is arranged on a single-layer board protruding from the main
body region including the six-layer board. With such a design, the
battery may be provided a position. When the display device is a
small-size display device such as a mobile phone, such an avoidance
design is particularly advantageous, and the capacity of the
battery may be increased.
[0120] In a specific implementation process, the flexible printed
circuit 4 may be bent to the back surface of the display panel to
realize a narrow frame design of the display device. The display
device provided by the embodiments of the present disclosure may be
any product or component with a display function, such as a mobile
phone, a tablet computer, a television, a display, a notebook
computer, a digital photo frame, a navigator, and so on. The other
indispensable components of the display device may be understood by
those ordinary skilled in the art, which will not be repeated here
and should not be used as a limitation to the embodiments of the
present disclosure.
[0121] The above descriptions are only specific embodiments of the
present disclosure, and the protection scope of the present
disclosure is not limited thereto. Any changes or substitutions
that may be easily envisaged by those skilled in the art within the
technical scope disclosed in the present disclosure should be
covered within the protection scope of the present disclosure.
Therefore, the scope of protection of the present disclosure should
be determined by the scope of protection defined by the claims.
* * * * *